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    POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION
    46.
    发明专利
    POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION 未知

    公开(公告)号：AU7988975A

    公开(公告)日：1976-10-14

    申请号：AU7988975

    申请日：1975-04-07

    Applicant: HOECHST AG

    Inventor： STRAMETZ HELMUT ,  LEUGERING HANS JOACHIM ,  RUST KURT ,  ENGELMANN MANFRED

    IPC: C08L23/00 ,  C08F2/00 ,  C08F2/14 ,  C08F297/00 ,  C08F297/08 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08F3/08 ,  C08F15/04 ,  C08F29/02 ,  C08F29/04

    Abstract: 1508033 Polyolefin compositions HOECHST AG 7 April 1975 [8 April 1974] 14080/75 Headings C3P and C3M Moulding compositions comprising (1) 70 to 90 weight per cent of crystalline polypropylene, (2) 2 to 10 weight per cent of an ethylene/propylene copolymer and (3) 8 to 25 weight per cent of polyethylene wherein the melt flow index of the composition is less than that of the polypropylene component and greater by a factor of 1À3 to 7À0 than that of polypropylene prepared by means of the same catalyst as the moulding composition and having the same reduced specific viscosity, may be prepared by (a) preparing polypropylene of melt flow index 5 to 80 g./10 mins. by polymerizing propylene at 0À5 to 40 kg/cm. and 40 to 110‹ C. in the presence of a stereo specific catalyst and 0- 1 to 20% by volume, based on the propylene, of hydrogen, (b) introducing ethylene at a propylene partial pressure of less than 0À5 kg./ cm. and 40‹ to 110‹ C. and (c) preparing polyethylene in a third step at a propylene partial pressure of less than 0À001 kg./cm. and a total pressure of 0À5 to 40 kg./cm. and at 40‹ to 110‹ C. in the presence of 1 to 50% by volume of hydrogen. In examples the polymers are prepared by sequential polymerization in the presence of catalysts comprising titanium trichloride and diethyl aluminium chloride.

    MIXED CATALYST FOR THE POLYMERIZATION OF AU-OLEFINS
    47.
    发明专利
    MIXED CATALYST FOR THE POLYMERIZATION OF AU-OLEFINS 未知

    公开(公告)号：CA993150A

    公开(公告)日：1976-07-13

    申请号：CA126645

    申请日：1971-11-02

    Applicant: HOECHST AG

    Inventor： GORDON WOLFGANG ,  RUST KURT ,  SCHROTT ERWIN

    IPC: C08F4/64 ,  C08F10/00

    Abstract: 1339332 α-Olefin polymerization FARBWERKE HOESCHST AG 5 Nov 1971 [7 Nov 1970] 51582/71 Heading C3P α-Olefins CH 2 = CHR where R is aliphatic with 1 to 4 carbon atoms are polymerized by themselves or with up to 5% by weight ethylene or block polymerized by themselves or with up to 25% by weight ethylene in suspension or in the gas phase at temperatures of 20‹ C. to 130‹ C. and gauge pressures of 0 to 50 atmospheres in the presence of a catalyst comprising (a) a phosphoric acid N alkylamide O = P(NR 2 ) 3 where the groups R may be the same or different hydrocarbon radicals having up to 4 carbon atoms and may be linked to other R groups, (e.g. hexaethyl or hexamethyl trisamide of phosphoric acid or phosphoric acid trisethyleneimide) (b) a cyclopolyalkene with 7 or 8 ring members and 2 to 4 non-cumulative double bonds in the ring or alkyl or alkoxysubstituted derivatives thereof having 1 to 4 carbon atoms in the alkyl radical (e.g. 1, 3, 5 cycloheptatriene, norcaradiene, cyclooctatriene or cyclooctatetraene) (c) a halogen containing compound of trivalent titanium and (d) a halogen free organoaluminium compound. In the examples propylene is polymerized in the presence and absence of preformed polypropylene using as catalyst TiCl 3 1/3 AlCl 3 , triethylaluminium, phosphoric acid hexamethyl trisamide and 1,3,5 cycloheptatriene or cyclooctatetraene. In Example 15 the product is treated with propanol and washed with acetone. Reference has been directed by the Comptroller to Specifications 920, 118, 1,018,341 and 1,254,016.

    48.
    发明专利
    未知

    公开(公告)号：DE2413261A1

    公开(公告)日：1975-09-25

    申请号：DE2413261

    申请日：1974-03-20

    Applicant: HOECHST AG

    Inventor： RUST KURT ,  SCHROTT ERWIN DIPL CHEM DR ,  STRAMETZ HELMUT DIPL CHEM DR

    IPC: C08F4/64 ,  C08F4/76 ,  C08F10/00

    Abstract: A catalyst of high activity and stereospecificity in alpha -olefin polymerization is obtained by subjecting titanium trichloride, obtained by reduction of titanium tetrachloride with aluminum alkyl halides, to two thermal treatments, the second thermal treatment being carried out in the presence of a dialkyl ether.

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